Boombop Long-tube Tri-Y Exhaust Header for the 2013+ Subaru BRZ, Scion FR-S - No Cat ***TUNING REQUIRED***Our long-tube, Tri-Y exhaust headers are designed to maximize the performance of the FA20 platform of the 2013+ Subaru BRZ and Scion FR-S. Each header is manufactured in-house with T304, mandrlel-bent stainless steel and fully TIG-welded. After extensive testing, we were able to make significant gains through the mid-range without sacrificing top-end power. The catless version of the header is only suitable for vehicles that will be tuned by aftermarket software.